HaikuDepot: add change confirmation event to progress listener

* Add a new event "ConfirmedChanges" to PackageProgressListener. It
  triggers when a package action was confirmed by the user and is
  about to be run. This can be used to e.g. get a full list of
  packages about to be installed (i.e. including dependencies)
  right before the process of fetching/installing them is started.

* Add a handler for it which looks at PackagesToActivate and sets
  all their PackageInfo states to pending (so now, when installing
  a package, its dependencies immediately become pending as well).

src/apps/haikudepot/model/PackageManager.cpp

@@ -1,11 +1,12 @@
 /*
- * Copyright 2013-2015, Haiku, Inc. All Rights Reserved.
+ * Copyright 2013-2017, Haiku, Inc. All Rights Reserved.
  * Distributed under the terms of the MIT License.
  *
  * Authors:
  *		Ingo Weinhold <[email protected]>
  * 		Stephan Aßmus <[email protected]>
  * 		Rene Gollent <[email protected]>
+ *		Julian Harnath <[email protected]>
  */
 
 
@@ -86,6 +87,13 @@ PackageProgressListener::DownloadProgressComplete(const char* packageName)
 }
 
 
+void
+PackageProgressListener::ConfirmedChanges(
+	BPackageManager::InstalledRepository& repository)
+{
+}
+
+
 void
 PackageProgressListener::StartApplyingChanges(
 	BPackageManager::InstalledRepository& repository)
@@ -209,6 +217,20 @@ public:
 		}
 	}
 
+	virtual	void ConfirmedChanges(BPackageManager::InstalledRepository&
+		repository)
+	{
+		BPackageManager::InstalledRepository::PackageList& activationList =
+			repository.PackagesToActivate();
+
+		BSolverPackage* package = NULL;
+		for (int32 i = 0; (package = activationList.ItemAt(i)); i++) {
+			PackageInfoRef ref(FindPackageByName(package->Info().Name()));
+			if (ref.Get() != NULL)
+				ref->SetState(PENDING);
+		}
+	}
+
 private:
 	void _SetDownloadedPackagesState(PackageState state)
 	{
@@ -690,6 +712,7 @@ PackageManager::ConfirmChanges(bool fromMostSpecific)
 
 	bool hasOtherChanges = false;
 	int32 count = fInstalledRepositories.CountItems();
+
 	if (fromMostSpecific) {
 		for (int32 i = count - 1; i >= 0; i--)
 			hasOtherChanges
@@ -700,12 +723,16 @@ PackageManager::ConfirmChanges(bool fromMostSpecific)
 				|= _AddResults(*fInstalledRepositories.ItemAt(i), window);
 	}
 
-	if (!hasOtherChanges)
+	if (!hasOtherChanges) {
+		_NotifyChangesConfirmed();
 		return;
+	}
 
 	// show the window
 	if (windowDeleter.Detach()->Go() == 0)
 		throw BAbortedByUserException();
+
+	_NotifyChangesConfirmed();
 }
 
 
@@ -813,6 +840,19 @@ PackageManager::_AddResults(InstalledRepository& repository,
 }
 
 
+void
+PackageManager::_NotifyChangesConfirmed()
+{
+	int32 count = fInstalledRepositories.CountItems();
+	for (int32 i = 0; i < count; i++) {
+		for (int32 j = 0; j < fPackageProgressListeners.CountItems(); j++) {
+			fPackageProgressListeners.ItemAt(j)->ConfirmedChanges(
+				*fInstalledRepositories.ItemAt(i));
+		}
+	}
+}
+
+
 BSolverPackage*
 PackageManager::_GetSolverPackage(PackageInfoRef package)
 {

src/apps/haikudepot/model/PackageManager.h

@@ -2,6 +2,7 @@
  * Copyright 2013, Stephan Aßmus <[email protected]>.
  * Copyright 2011, Ingo Weinhold, <[email protected]>
  * Copyright 2013, Rene Gollent, <[email protected]>
+ * Copyright 2017, Julian Harnath <[email protected]>.
  *
  * All rights reserved. Distributed under the terms of the MIT License.
  */
@@ -47,6 +48,10 @@ class PackageProgressListener {
 	virtual	void				DownloadProgressComplete(
 									const char* packageName);
 
+	virtual	void				ConfirmedChanges(
+									BPackageManager::InstalledRepository&
+										repository);
+
 	virtual	void				StartApplyingChanges(
 									BPackageManager::InstalledRepository&
 										repository);
@@ -119,6 +124,7 @@ private:
 									BPackageManager::InstalledRepository&
 										repository,
 									ResultWindow* window);
+			void				_NotifyChangesConfirmed();
 
 			BPackageKit::BSolverPackage*
 								_GetSolverPackage(PackageInfoRef package);